.ajax-mask {
  background: none;
}

.ajax-mask .loading {
  width: 50px;
  height: 50px;
  background: #333 url('loading_mask.gif') center center no-repeat;
  border-radius: 3px;
  -moz-border-radius: 3px;
  -webkit-border-radius: 3px;
  position: relative;
  left:50%;
  margin-left:-25px;
  top:50%;
  margin-top: -25px;
  opacity: 0.9;
  -moz-opacity: 0.9;
}
